Re: [FFmpeg-devel] [PATCH 05/11] aacenc: add support for coding of intensity stereo scalefactor indices
On Mon, Jun 29, 2015 at 02:23:33AM -0300, Claudio Freire wrote: > Seems straightforward enough. LGTM. applied thanks [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Everything should be made as simple as possible, but not simpler. -- Albert Einstein signature.asc Description: Digital signature ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] [PATCH 05/11] aacenc: add support for coding of intensity stereo scalefactor indices
Seems straightforward enough. LGTM. On Fri, Jun 26, 2015 at 5:16 PM, Rostislav Pehlivanov wrote: > This commit adds support for the coding of intensity stereo scalefactor > indices. It does not do any marking of such bands and as such does no > functional changes to the encoder. It removes any old twoloop specific code > for PNS and moves it into a seperate function which handles setting of > scalefactor indices for PNS and IS bands. > --- > libavcodec/aaccoder.c | 37 + > libavcodec/aacenc.c | 6 +- > 2 files changed, 42 insertions(+), 1 deletion(-) > > diff --git a/libavcodec/aaccoder.c b/libavcodec/aaccoder.c > index 3c90d27..02ffe17 100644 > --- a/libavcodec/aaccoder.c > +++ b/libavcodec/aaccoder.c > @@ -607,6 +607,43 @@ typedef struct TrellisPath { > #define TRELLIS_STAGES 121 > #define TRELLIS_STATES (SCALE_MAX_DIFF+1) > > +static void set_special_band_scalefactors(AACEncContext *s, > SingleChannelElement *sce) > +{ > +int w, g, start = 0; > +int minscaler_n = sce->sf_idx[0], minscaler_i = sce->sf_idx[0]; > +int bands = 0; > + > +for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { > +start = 0; > +for (g = 0; g < sce->ics.num_swb; g++) { > +if (sce->band_type[w*16+g] == INTENSITY_BT || > sce->band_type[w*16+g] == INTENSITY_BT2) { > +sce->sf_idx[w*16+g] = > av_clip(ceilf(log2f(sce->is_ener[w*16+g])*2), -155, 100); > +minscaler_i = FFMIN(minscaler_i, sce->sf_idx[w*16+g]); > +bands++; > +} else if (sce->band_type[w*16+g] == NOISE_BT) { > +sce->sf_idx[w*16+g] = > av_clip(4+log2f(sce->pns_ener[w*16+g])*2, -100, 155); > +minscaler_n = FFMIN(minscaler_n, sce->sf_idx[w*16+g]); > +bands++; > +} > +start += sce->ics.swb_sizes[g]; > +} > +} > + > +if (!bands) > +return; > + > +/* Clip the scalefactor indices */ > +for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { > +for (g = 0; g < sce->ics.num_swb; g++) { > +if (sce->band_type[w*16+g] == INTENSITY_BT || > sce->band_type[w*16+g] == INTENSITY_BT2) { > +sce->sf_idx[w*16+g] = av_clip(sce->sf_idx[w*16+g], > minscaler_i, minscaler_i + SCALE_MAX_DIFF); > +} else if (sce->band_type[w*16+g] == NOISE_BT) { > +sce->sf_idx[w*16+g] = av_clip(sce->sf_idx[w*16+g], > minscaler_n, minscaler_n + SCALE_MAX_DIFF); > +} > +} > +} > +} > + > static void search_for_quantizers_anmr(AVCodecContext *avctx, AACEncContext > *s, > SingleChannelElement *sce, > const float lambda) > diff --git a/libavcodec/aacenc.c b/libavcodec/aacenc.c > index 897c3a1..3a512ff 100644 > --- a/libavcodec/aacenc.c > +++ b/libavcodec/aacenc.c > @@ -389,7 +389,7 @@ static void encode_scale_factors(AVCodecContext *avctx, > AACEncContext *s, > SingleChannelElement *sce) > { > int diff, off_sf = sce->sf_idx[0], off_pns = sce->sf_idx[0] - > NOISE_OFFSET; > -int noise_flag = 1; > +int off_is = 0, noise_flag = 1; > int i, w; > > for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { > @@ -402,6 +402,10 @@ static void encode_scale_factors(AVCodecContext *avctx, > AACEncContext *s, > put_bits(&s->pb, NOISE_PRE_BITS, diff + NOISE_PRE); > continue; > } > +} else if (sce->band_type[w*16 + i] == INTENSITY_BT || > + sce->band_type[w*16 + i] == INTENSITY_BT2) { > +diff = sce->sf_idx[w*16 + i] - off_is; > +off_is = sce->sf_idx[w*16 + i]; > } else { > diff = sce->sf_idx[w*16 + i] - off_sf; > off_sf = sce->sf_idx[w*16 + i]; > -- > 2.1.4 > > ___ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
[FFmpeg-devel] [PATCH 05/11] aacenc: add support for coding of intensity stereo scalefactor indices
This commit adds support for the coding of intensity stereo scalefactor indices. It does not do any marking of such bands and as such does no functional changes to the encoder. It removes any old twoloop specific code for PNS and moves it into a seperate function which handles setting of scalefactor indices for PNS and IS bands. --- libavcodec/aaccoder.c | 37 + libavcodec/aacenc.c | 6 +- 2 files changed, 42 insertions(+), 1 deletion(-) diff --git a/libavcodec/aaccoder.c b/libavcodec/aaccoder.c index 3c90d27..02ffe17 100644 --- a/libavcodec/aaccoder.c +++ b/libavcodec/aaccoder.c @@ -607,6 +607,43 @@ typedef struct TrellisPath { #define TRELLIS_STAGES 121 #define TRELLIS_STATES (SCALE_MAX_DIFF+1) +static void set_special_band_scalefactors(AACEncContext *s, SingleChannelElement *sce) +{ +int w, g, start = 0; +int minscaler_n = sce->sf_idx[0], minscaler_i = sce->sf_idx[0]; +int bands = 0; + +for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { +start = 0; +for (g = 0; g < sce->ics.num_swb; g++) { +if (sce->band_type[w*16+g] == INTENSITY_BT || sce->band_type[w*16+g] == INTENSITY_BT2) { +sce->sf_idx[w*16+g] = av_clip(ceilf(log2f(sce->is_ener[w*16+g])*2), -155, 100); +minscaler_i = FFMIN(minscaler_i, sce->sf_idx[w*16+g]); +bands++; +} else if (sce->band_type[w*16+g] == NOISE_BT) { +sce->sf_idx[w*16+g] = av_clip(4+log2f(sce->pns_ener[w*16+g])*2, -100, 155); +minscaler_n = FFMIN(minscaler_n, sce->sf_idx[w*16+g]); +bands++; +} +start += sce->ics.swb_sizes[g]; +} +} + +if (!bands) +return; + +/* Clip the scalefactor indices */ +for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { +for (g = 0; g < sce->ics.num_swb; g++) { +if (sce->band_type[w*16+g] == INTENSITY_BT || sce->band_type[w*16+g] == INTENSITY_BT2) { +sce->sf_idx[w*16+g] = av_clip(sce->sf_idx[w*16+g], minscaler_i, minscaler_i + SCALE_MAX_DIFF); +} else if (sce->band_type[w*16+g] == NOISE_BT) { +sce->sf_idx[w*16+g] = av_clip(sce->sf_idx[w*16+g], minscaler_n, minscaler_n + SCALE_MAX_DIFF); +} +} +} +} + static void search_for_quantizers_anmr(AVCodecContext *avctx, AACEncContext *s, SingleChannelElement *sce, const float lambda) diff --git a/libavcodec/aacenc.c b/libavcodec/aacenc.c index 897c3a1..3a512ff 100644 --- a/libavcodec/aacenc.c +++ b/libavcodec/aacenc.c @@ -389,7 +389,7 @@ static void encode_scale_factors(AVCodecContext *avctx, AACEncContext *s, SingleChannelElement *sce) { int diff, off_sf = sce->sf_idx[0], off_pns = sce->sf_idx[0] - NOISE_OFFSET; -int noise_flag = 1; +int off_is = 0, noise_flag = 1; int i, w; for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { @@ -402,6 +402,10 @@ static void encode_scale_factors(AVCodecContext *avctx, AACEncContext *s, put_bits(&s->pb, NOISE_PRE_BITS, diff + NOISE_PRE); continue; } +} else if (sce->band_type[w*16 + i] == INTENSITY_BT || + sce->band_type[w*16 + i] == INTENSITY_BT2) { +diff = sce->sf_idx[w*16 + i] - off_is; +off_is = sce->sf_idx[w*16 + i]; } else { diff = sce->sf_idx[w*16 + i] - off_sf; off_sf = sce->sf_idx[w*16 + i]; -- 2.1.4 ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel